We've found HP "multipurpose" device drivers to be more like a virus than like real software, since they tend to demand that you let them "take over everything" and constantly whine, via popups, about "needing updates" that don't exist. We have "real programs" for most of the functions built into the HP drivers, and were constantly "turning things off" to get to what we wanted to use - and nothing stays turned off when you reboot.
With WinXP, we've ended up deleting the HP drivers for our little HP1315xi, and just letting WinXP install "defaults." Vista drivers specific to your combi may not be "on the Vista DVD" yet; but you might get generic ones off the Vista disk that would let you use most of the functions, just be running a PnP install(?). (You might have to install the print, scan, fax, etc functions individually.)
If/when you can get HP's drivers, you'll probably want to try them out, but we've found them more intrusive than helpful. You may actually like the way they work ...
(Just to add a cheery note to your problems, of course.)